Michael J. Mansfield (March 16, 1903 - October 5, 2001) was an American politician. Although born in New York City to Irish Catholic immigrants, he was raised in Montana, where he graduated from the University of Montana and was a member of the Alpha Tau Omega fraternity. Mansfield would represent the state of Montana throughout his political career. He publicly recalled the anti-Catholic discrimination his family felt in Montana, after the state received a very large number of Irish emigrants in the late 19th century onwards, around Butte especially, as the result of the Famine in Ireland, and poverty.